CN1103954C - Transparent record access supervisor of disk drive - Google Patents
Transparent record access supervisor of disk drive Download PDFInfo
- Publication number
- CN1103954C CN1103954C CN99105347A CN99105347A CN1103954C CN 1103954 C CN1103954 C CN 1103954C CN 99105347 A CN99105347 A CN 99105347A CN 99105347 A CN99105347 A CN 99105347A CN 1103954 C CN1103954 C CN 1103954C
- Authority
- CN
- China
- Prior art keywords
- record
- ring
- disc driver
- relative
- address
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0604—Improving or facilitating administration, e.g. storage management
- G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
- G06F3/0674—Disk device
Abstract
In a disk drive, a transparent record access manager centralizes access to system cylinder records in two global routines for reading and writing to the system cylinder records, and a system cylinder table which maintains address information for the system cylinder records. Internal firmware system cylinder record users and host software programs access system cylinder records through the system cylinder record manager, which in turn locates system cylinder records through the system cylinder table. The transparent record access manager makes any changes to the address or length of a particular system cylinder record transparent to the users of all other system cylinder records. An ATA command process allows a host processor to access a system cylinder record through the read and write routines, or to recieve the system cylinder table from the disk drive.
Description
Technical field
The present invention relates to disc driver storage system field, relate in particular to system's ring record management server of system's ring record in the disc driver storage system.
Background technology
The disc driver storage system is included in normal running and the inner stored record of using of test period.These records that are called system's ring record are stored in the reserve area that is called system's ring in the disc driver.Some typical record instances that are stored in system's ring have: the ageing state of disc driver; The aging mistake login that causes of disk; Login the disk defect record that constitutes by mistake; And each regional channel table of disc driver.Some record in these records is so important for the proper operation of disc driver, so that they all are mirror images to all magnetic heads.
User capture system ring record is to carry out the various operations relevant with disc driver.The user can add the recording processing subsystem in disc driver, generally include hardware program.The user can also add those software programs that can carry out in the host process system that disc driver connected.
In the prior art, the user of each system ring record needs to keep the tracking to the physical location of record, the ring in system's ring record just, magnetic head, the quantity of (CHS) address, sector and record.Whether the user will be the situation maintenance tracking of mirror image to record also, if, the physical location that will follow the tracks of ghost record.
Fig. 1 is the process flow diagram that supplies a kind of process 100 of user capture system ring record and update system ring record in the prior art.In step 105, the user of system's ring record handles data, up to the time of determining storage data in system's ring record in step 110.If the time of storage data, the user of system's ring record just calls read/write procedure in step 120, so that upgrade this record.The user of system ring record provides the buffer address at data place, the ring of system's ring record, magnetic head and sector (CHS) address, and the record number that will store for program.The user of system's ring record carries out marginal check in step 130, and as required to the ring of system's ring record, magnetic head and sector (CHS) address is upgraded.
Fig. 2 is (ATA) command procedure 200 of ATAttachment (annex) that is used for a kind of prior art of main software program on host processing system, with visiting and upgrading a system's ring record on the attached disc driver.When main software program was determined to be the time of storage data in system ring record in step 210, main software program just sent an order that transmits data to driver hardware, the number of transmission ring, magnetic head, initial sector and the record that will transmit.Then, the validity of disc driver check command in step 220 is called a read/write procedure, and the buffer address at data place is provided, the ring of system's ring record, magnetic head and sector (CHS) address, and the record number of wanting write or read.In step 240, exchange predetermined data with read/write procedure and system's ring record.
The shortcoming of this prior art also need to be the major software that changes the several regions in the disc driver hardware and visit these records when revising system's ring interrecord structure.For example, if ten two (12) individual continuous system's ring records are arranged, and expand to the 15 record in proper order, the user of record six to 12 just must make amendment to the method for visiting these records.
The system and method for prior art visit and update system ring record also exists other shortcomings.These prior art systems have been wasted the code space of whole redundant operation.In addition, the marginal check that relates to the physical location of record is tediously long, and this wherein comprises ring, the verification of magnetic head and sector.
Therefore, preferably provide a kind of usefulness to visit the central system and the method for system's ring record in the disc driver.Preferably provide unique ata command in addition, so that allow the software of primary processor can using system ring record.From hereinafter it can also be seen that other and further purpose and advantage.
Summary of the invention
The system and method that the purpose of this invention is to provide the system's ring record in a kind of hyperdisk driver.
According to one aspect of the present invention, system's ring record management server focus actuator hardware and be used for the major software of access system ring record.All users of system's ring record visit these records by system's ring record management server.
According to another aspect of the present invention, system's ring record management server comprises system's ring table.System's ring table is the relative record of the system's ring posting field starting point skew from disc driver with the address definition of system's ring record.System's ring table is preserved the information about each record, and for example whether size and this record of each record are mirror images.
According to another aspect of the present invention, system's ring record management server provides unique AT annex (ATA) order, and the major software that allows to move on primary processor conducts interviews to the system's ring record in the attached disc driver.
The present invention also provides a kind of method of visiting required system ring record in the disc driver, this method comprises the following steps: to receive a relative sector address and an index value, and described index value is used for identifying a required list item in comprising system's ring table of a plurality of list items; Determine required list item in system's ring table with described index value; Visit required list item; In the relative record offset domain of required list item, seek a relative record off-set value; And, the relative record off-set value is become with the relative sector address translation with the start address that visits required system ring record.
Description of drawings
Fig. 1 supplies the user capture of system's ring record and the process flow diagram of a kind of process that the update system ring writes down in the prior art.
Fig. 2 be prior art on host processing system, be used to visit process flow diagram with AT annex (ATA) command procedure of the main software program of update system ring record.
Fig. 3 is the synoptic diagram according to system's ring record sheet of a preferred embodiment of the invention.
Fig. 4 A is the process flow diagram of the present invention with a preferred embodiment of the process of the information of transparent record access supervisor (TRAM) visit and read-out system ring record.
To be the present invention visit process flow diagram with a preferred embodiment of the process of the information of writing system ring record with transparent record access supervisor (TRAM) to Fig. 4 B.
Fig. 5 is the process flow diagram of AT annex of the present invention (ATA) command procedure, and primary processor conducts interviews to record with transparent record access supervisor (TRAM).
Embodiment
The present invention concentrates on the processing of system ring record in two system's ring record access programs and the system's ring table.Internal hardware system ring recording user and main software program visit system's ring record by these two programs.It all is transparent to the user that system's ring writes down that this program makes the address of record or any change on the length.Can more be expressly understood this transparent operation mode with reference to following description of a preferred embodiment.
Fig. 3 has represented a preferred embodiment of system's ring table 300.System's ring table 300 comprises a plurality of list items 305, and each list item 305 has 320, one record size territories 330 of a relative record offset domain, and a mirror image/non-mirror image territory 340.Each list item 305 corresponding to and represent specific system's ring record in system's ring table 300.
As shown in Figure 3, system's ring table is retrieved, when the list item numbering equals an index value, just can be visited each list item corresponding to system's ring record.In the embodiments of figure 3, has the list item of index value " 0 " corresponding to the ageing state record; List item with index value " 1 " is corresponding to the defect list record; List item with index value " 2 " is corresponding to the mistake login record, or the like.In system's ring table, can list item be conducted interviews like this by index value corresponding to specific list item position.
The relative record off-set value of a correspondence all is provided for each the system's ring record in system's ring table 300 in relative record offset domain 320.In example shown in Figure 3, the relative record off-set value of first list item (index value is " 0 ") is that the relative record off-set value of 2942, the second list items (index value is " 1 ") is 3016, or the like.The relative record off-set value has been represented the IP address in this specific system's ring record that is recorded in disc driver.
According to following formula (1), the relative record off-set value is corresponding to the record start address in the form of standard ring/magnetic head/sector (CHS):
Relative record skew=(ring) * (magnetic head/ring) * (sector/magnetic head)+magnetic head * (sector/magnetic head)+sector
For example, consider that each ring of a disc driver has 12 magnetic heads, and each magnetic head there is the situation of 60 sectors.In order to seek relative record off-set value, can from formula (1), obtain corresponding to 4/1/2 CHS address:
Relative record skew=(4*12*60)+(1*60)+2=2880+60+2=2942 its in the example of Fig. 3 corresponding to the starting point of record with index value=" 0 " (for example, ageing state).
The record size that also has a correspondence in the record size territory 330 of each list item, and in mirror image/non-mirror image territory 340, a mirror image/non-mirror flag is arranged.The size of record writes down employed sector number corresponding to this.Setting mirror image/non-mirror flag indicates this to be recorded in mirrored state in system's ring record.A disc driver can have a plurality of magnetic heads that are used for a plurality of cards are carried out read and write, one or more systems ring can be recorded on another card in this case and get mirror image, and conduct interviews with another magnetic head.Disc driver can have single disk, maybe can have a plurality of disks of reading with a plurality of magnetic heads, and this record can be a mirror image to all magnetic heads in this case.
System's ring table provides a kind of mechanism of the address that is used for saved system ring record in disc driver like this.No matter when when the structure of system's ring record is made amendment, in this single table, be easy to scheduler.For example, can increase a new record by utilizing a new list item of new index value generation that is used to refer to the information (address, record size, mirror image/non-mirrored state) that belongs to new record.
Fig. 4 A is " transparent record access supervisor " (TRAM) program flow diagram of a preferred embodiment of reader 400, is used for and comes together to visit information with read-out system ring record such as such system's ring table of system's ring table of Fig. 3.
In step 405, the relative sector address that the user who is write down by system's ring provides index value and treats read record, the sector number that continues, and the impact damper start address at the data place that will send.
Carry out marginal check in step 410, the record of being asked to guarantee is to be within the border of record.If the enrollment of being asked outside the border, with regard to undo, and is returned a mistake.In step 415, index value is become the CHS address of employing system ring table with the relative sector address translation.As mentioned above, index value has shown required list item in system's ring table.Required list item is conducted interviews, to obtain a relative record skew of corresponding record.Utilize described formula (1) to convert the relative record skew to a CHS address.Add the relative sector address then and produce the CHS start address for the treatment of read record.
In step 420, carry out read operation, and send the information of reading to impact damper.
In step 425, carry out verification, determine whether to have occurred mistake.If do not go wrong, with regard to termination routine 400.If mistake, just in step 430, carry out verification, be mirror image with the record determining to be asked.
Visit required list item, to obtain corresponding mirror image/non-mirror flag.If do not set this sign, just represent that this record is not a mirror image, just produce mistake and termination routine 400 this moment, returns this mistake.
If set sign, just represent that this record is a mirror image, in step 435, magnetic head switched to the record of reading this mirror image then.To ghost record repeating step 420, carry out read operation subsequently, and this recorded information is sent to impact damper.
Fig. 4 B represents the write a program process flow diagram of 450 preferred embodiment of a TRAM, is used for such as such system's ring table of system's ring table of Fig. 3 system's ring record being conducted interviews and writing information.
In step 455, system's ring recording user provides the index value and the relative sector address of the record that will write, the sector number that transmit, and the impact damper start address at the data place that need write.
In step 460, carry out marginal check, with the enrollment that guarantees to be asked within record delimitation.If the enrollment of being asked outside the border, is not just carried out this operation, and is returned a mistake.In step 465, utilize system's ring table that index value is become a CHS address with the relative sector address translation.Index value is used to the required list item in system's ring table is conducted interviews.Obtain a relative record skew of respective record by visit to required list item.Utilize described formula (1), convert the relative record skew to a CHS address.Add the relative sector address then, to produce the CHS start address of the record that will write.
In step 470, transmit recorded information from impact damper, and carry out write operation.
Carrying out verification in step 475, is mirror image to determine required record.Required list item is conducted interviews, to obtain corresponding mirror image/non-mirror flag.If do not set this sign, just represent that this record is not a mirror image, just finish this program 450 this moment.
If set sign, just represent that this record is a mirror image, then in step 485 verification whether relatively ghost record write all magnetic heads.If all magnetic heads are all write, with regard to termination routine 450.
If do not write all magnetic heads as yet, just in step 490, switch magnetic head.To the record repeating step 470 of mirror image, transmit recorded information then, and carry out write operation from impact damper.
In a preferred embodiment, can and write a program code storage in the ROM (read-only memory) (ROM) of disk driver interior with reader.
Fig. 5 is the process flow diagram of AT annex (ATA) command procedure 500 of a preferred embodiment, allows the software of primary processor conduct interviews to comprising according to the system's ring record in the disc driver of the transparent record access supervisor of one or more aspects of the present invention.When primary processor need be visited a system ring record, it just sends a special use to driver hardware in step 510 ATA TRAM ordered.The validity that driver hardware receives and verification should be ordered.
In step 520, driver hardware judges that this order is " system log (SYSLOG) inquiry " subcommand.If hardware just transmits " system's ring " table to primary processor in step 525.In this case, major software can re-construct the system's ring/magnetic head/sector position of a record, and according to mode shown in Figure 2 record is operated.In this case, this size that is recorded in system's ring table has limited manageable record quantity.
In step 540, driver hardware judges that this order is " read apparatus record " subcommand.If then subcommand also comprises some parameters, in these parameters, comprise the index that is used for identifying required record, relative sector address, and the sector number that continues.In this case, hardware calls a reader shown in Fig. 4 A in step 545, and the index value for the treatment of read record is provided, relative sector address, the sector number that continues, and the impact damper start address that will place these data.After sense data, hardware is just going on foot in 550 to main processor software transfer system ring record data.
In step 560, driver hardware judges that this order is " one-writing system record " subcommand.If then subcommand also comprises some parameters, in these parameters, comprise the index that is used for identifying required record, relative sector address, and the sector number that continues.In this case, hardware just in step 565 from main processor software transfer system ring record data.Then, hardware calls writing a program shown in Fig. 4 B in step 570, and the index value of the record that will write is provided, relative sector address, the sector number that write, and the impact damper start address at these data places.
At last, in step 580, if this order is not one " system log (SYSLOG) inquiry ", " read apparatus record " subcommand, perhaps one " one-writing system record " subcommand, driver hardware is just refused this order.
Should understand and to carry out various changes above preferred embodiment.For example, in another embodiment of ata command program, can save " system log (SYSLOG) inquiry " subcommand, and not provide " system's ring table " to primary processor.In addition, in another embodiment of ata command program, may not allow primary processor in system's ring record, to write data, can omit step 560 in this case, 565 and 570.
Although described preferred embodiment in this article, within design of the present invention and scope, also may there be many change forms.At the instructions of having read this paper, after accompanying drawing and claims, these modification will be readily apparent to persons skilled in the art.Therefore, the present invention only is subjected to the restriction of the essence and the scope of appended claims.
Claims (10)
1. visit the method that required system ring writes down in the disc driver for one kind, comprise step:
Receive a relative sector address and an index value, described index value is used for identifying a required list item in comprising system's ring table of a plurality of list items;
Determine required list item in system's ring table with described index value;
Visit required list item;
In the relative record offset domain of required list item, seek a relative record off-set value; And
The relative record off-set value is become with the relative sector address translation with the start address that visits required system ring record.
2. according to the method for system's ring record in the visit disc driver of claim 1, wherein said start address comprises ring number " C " head number " H " and a sector number " S " address.
3. according to the method for system's ring record in the visit disc driver of claim 2, wherein disc driver comprises " N " individual magnetic head and the disk with " M " individual sector, and wherein the relative record off-set value equals C*N*M+H*M+S.
4. according to the method for system's ring record in the visit disc driver of claim 1, wherein also comprise:
Mirror image/non-mirror flag of setting in the mirror image of searching list item in system's ring table/non-mirror image territory;
A magnetic head in the switchable disk driver; And
Access system ring record on the mirror position of disc driver.
5. according to the method for system's ring record in the visit disc driver of claim 1, wherein also comprise:
Begin the data of system's ring record are read the impact damper from start address.
6. according to the method for system's ring record in the visit disc driver of claim 5, wherein also comprise:
Receive the continue numeral of sector number of an indication;
The data of sector number of from system ring record correspondence being continued are read in the impact damper.
7. according to the method for system's ring record in the visit disc driver of claim 1, wherein also comprise:
Begin data writing system ring record from start address from impact damper.
8. according to the method for system's ring record in the visit disc driver of claim 7, wherein also comprise:
Receive the numeral of the sector number that an indication will write;
The data of the sector number that from impact damper correspondence will be write are written to system's ring record.
9. according to the method for system's ring record in the visit disc driver of claim 1, this method is used in the computing machine with primary processor and disc driver, and primary processor is sense data from required system's ring record
Wherein, the step of described reception relative sector address and index value is carried out by a reader,
And before the step of described reception relative sector address and index value, described method also comprises the following steps:
Send an order from primary processor to disc driver, described order comprises an index value that is used for identifying required record, a relative sector address, and the numeral that is used to refer to the sector number that continues;
In disc driver, receive described order; And
For the reader in the disc driver provides the index value that is used for identifying described required record, relative sector address, and the sector number that continues,
And after the step of the described start address that the relative record off-set value is become required system ring record with the relative sector address translation, described method also comprises the following steps:
From start address, the continue data of sector number of correspondence are read the impact damper from required system ring record; And
Transmit data from impact damper to primary processor.
10. according to the method for system's ring record in the visit disc driver of claim 1, this method is used in the computing machine with primary processor and disc driver, and primary processor writes data to required system's ring record
Wherein, the step of described reception relative sector address and index value is by the execution of writing a program,
And before the step of described reception relative sector address and index value, described method also comprises the following steps:
Send a write order from primary processor to disc driver, described order comprises an index value that is used for identifying required record, a relative sector address, and the numeral that is used to refer to the sector number that will write;
In disc driver, receive described write order;
Transmit data from primary processor to an impact damper; And
For writing a program in the disc driver provides the index value that is used for identifying described required record,
Relative sector address, and the sector number that will write,
And after the step of the described start address that the relative record off-set value is become required system ring record with the relative sector address translation, described method also comprises the following steps:
From start address, the data of the sector number that correspondence will be write from impact damper are write required system's ring record.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US6999398A | 1998-04-30 | 1998-04-30 | |
| US069993 | 1998-04-30 | ||
| US069,993 | 1998-04-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1248040A CN1248040A (en) | 2000-03-22 |
| CN1103954C true CN1103954C (en) | 2003-03-26 |
Family
ID=22092465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99105347A Expired - Fee Related CN1103954C (en) | 1998-04-30 | 1999-04-30 | Transparent record access supervisor of disk drive |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0953893A3 (en) |
| JP (1) | JP3210908B2 (en) |
| KR (1) | KR100298790B1 (en) |
| CN (1) | CN1103954C (en) |
| AU (1) | AU717464B2 (en) |
| CA (1) | CA2268543C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4924331A (en) * | 1985-11-20 | 1990-05-08 | Seagate Technology, Inc. | Method for mapping around defective sectors in a disc drive |
| US4999720A (en) * | 1989-06-05 | 1991-03-12 | Maxtor Corporation | Zone density sector counter |
| US5367652A (en) * | 1990-02-02 | 1994-11-22 | Golden Jeffrey A | Disc drive translation and defect management apparatus and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02501776A (en) * | 1987-09-30 | 1990-06-14 | ユニシス コーポレーシヨン | A cache/disk system with command selection based on disk access time. |
| JP2625609B2 (en) * | 1991-07-10 | 1997-07-02 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Disk storage device |
| US5394532A (en) * | 1992-04-15 | 1995-02-28 | Storage Technology Corporation | Disk drive array memory system having instant format capability |
| US5729397A (en) * | 1992-12-31 | 1998-03-17 | International Business Machines Corporation | System and method for recording direct access storage device operating statistics |
| JPH07169202A (en) * | 1993-12-13 | 1995-07-04 | Nec Ibaraki Ltd | Magnetic disk device |
| JPH08180598A (en) * | 1994-12-26 | 1996-07-12 | Toshiba Corp | Data recording/reproducing device and defect processing method |
| KR0156401B1 (en) * | 1994-12-30 | 1998-12-15 | 이헌조 | Disc cashe dealing method of i/o processor |
| JP3641863B2 (en) * | 1995-12-19 | 2005-04-27 | ソニー株式会社 | Data recording apparatus and method |
-
1999
- 1999-04-12 CA CA002268543A patent/CA2268543C/en not_active Expired - Fee Related
- 1999-04-28 KR KR1019990015220A patent/KR100298790B1/en not_active IP Right Cessation
- 1999-04-29 EP EP99107467A patent/EP0953893A3/en not_active Ceased
- 1999-04-30 AU AU26038/99A patent/AU717464B2/en not_active Ceased
- 1999-04-30 CN CN99105347A patent/CN1103954C/en not_active Expired - Fee Related
- 1999-04-30 JP JP12389499A patent/JP3210908B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4924331A (en) * | 1985-11-20 | 1990-05-08 | Seagate Technology, Inc. | Method for mapping around defective sectors in a disc drive |
| US4999720A (en) * | 1989-06-05 | 1991-03-12 | Maxtor Corporation | Zone density sector counter |
| US5367652A (en) * | 1990-02-02 | 1994-11-22 | Golden Jeffrey A | Disc drive translation and defect management apparatus and method |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0953893A2 (en) | 1999-11-03 |
| KR100298790B1 (en) | 2001-10-29 |
| JP2000029633A (en) | 2000-01-28 |
| CA2268543C (en) | 2003-12-09 |
| KR19990083567A (en) | 1999-11-25 |
| AU717464B2 (en) | 2000-03-30 |
| AU2603899A (en) | 1999-11-11 |
| EP0953893A3 (en) | 2007-08-29 |
| CA2268543A1 (en) | 1999-10-30 |
| JP3210908B2 (en) | 2001-09-25 |
| CN1248040A (en) | 2000-03-22 |
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